Steam-turbine.



PATENTED OCT. 18, 1904.

E. BUCHANAN.

STEAM TURBINE. APPILIOATIOH FILED OUT. 22. 1902.

1 A TTOIYNEY- UNITED STATES Patented October 18, 1904.

PATENT OFFICE.

STEAM-TURBINE.

SPECIFICATION forming part of Letters Patent No. 772,868, dated October 18, 1904. I

Application filed October 22, 1902.

the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming a part hereof.

My invention has relation to improvements in steam-turbines; and it consists in the novel arrangement-and combination of parts more fully set forth in the specification and pointed out in the claims.

In the drawings, Figure 1 is a frontelevation of my invention. Fig. 2 is an end view thereof. .-Fig. 3 is a transverse section on the line 3 3 of Fig. 1. Fig. 4 is a face elevation of one of the cylinders with the near wall removed. Fig. 5 isan edge view ofone of the pistons. Fig. 6 is a face elevationof one of the pistons, and Fig. 7 is a detail of one of the steam-controlling valves.

The object of my invention is to construct a steam-turbine which shall utilize to the best advantage the expansive force of steam-retaining the latter within the cylinder for a maximum length of time. whereby it may-ex haust only after its force has been fully ex pended.

In detail the invention may be described as follows:

Referring to the drawings, 1 represents adrive-shaft, mounted in suitable bearings 2, the shaft having mounted thereon a series of rotary pistons 3, each of which is confined within a cylinder 4:, through the face-walls of which the shaft loosely passes. Leading through the peripheral wall of the first of the series of cylinders and discharging tangentially against the radial abutments 3 of the piston in said cylinder is a steam-pipe 5, each cylinder being provided at a point diametrically opposite the steam-inlet with a dischargepipe 5, which-in turn communicates similarly to the pipe 5 with the next adjacent cylinder, and so on till the' end of the series, the last cylinder discharging at a point diametrically opposite the point of entry of the pipe leading from the cylinder immediately preceding.

$eria1No. 128,369. on model.)

Any of-the pipes 5 may be provided with a shunt 5", through whichv the steam may be allowed to exhaust before traversing the entire series of cylinders, this earlier discharge being accomplished by closing the two-way valve V, located in the pipe 5, and opening a corresponding controlling-valve V in the shunt 5". (See Fig. 7.)

By disposingthe pipes 5 5 tangentially to the peripheral walls of the respective cylinders the steam encounters a minimum amount of friction, and'at the same time impinges upon the abutments 3 at an angle which gives the best possible results. Again, by combining a series of cylinders in the manner indicated the expansive force of the motor fluid is not spent until the last cylinder has been traversed, so that my present arrangement produces amaximum efliciency and a corresponding increase in power over the ordinary form of engine.

I do not,'of course, wish to be limited to the number of cylinders nor to the details herein shown, as these may in a measure be departed from without 1n any wise affecting the na jacent cylinder, a shunt for one of said con-1 necting-pipes, and controlling-valves in said pipes, the several pipes being disposed tangentially to the walls of the cylinders, and the last cylinder discharging at a point diametrically opposite the point of entry of the pipe leading from the cylinder immediately preceding, substantially as set forth.

In testimony whereof I aflix my signature in presence of two witnesses.

ESAU BUCHANAN. Witnesses:

FELIX SENTER, N. P. VANovER. 

